Plugins not working for my server.

I am having trouble with plugins working on my server. I created a faction server and added the plugins with the correct [lexicon]Minecraft[/lexicon] version but they all don't work. I logged onto [lexicon]Minecraft[/lexicon] as op and I did /plugins but it says that I have 0 plugins. I tried deleting my map and plugins, trying to have a fresh start but that doesn't work too. What seems to be the problem?

Thanks for helping me. Also, I created a spawn point on my server. How do I protect that place so people can't break blocks?

I tried getting worldguard and worldedit on my server but I don't think worldguard works on 1.7.2. I was able to get the //wand feature from worldedit but I wasn't able to /region define spawn. I tried many combinations but they all turned out to be a fail. It tell me that the command does not exist.

Thanks that worked out well.